Verbseoul.
하다 verb (adj)
간곡하다gangokhadato be earnest

To say to be earnest politely in the present tense, use 간곡해요 (gahn-goh-kae-yoh). Below is the full conjugation of 간곡하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
간곡해
gahn-goh-kae
간곡해요
gahn-goh-kae-yoh
간곡합니다
gahn-goh-kahm-nee-dah
Past
간곡했어
gahn-goh-kae-ssuh
간곡했어요
gahn-goh-kae-ssuh-yoh
간곡했습니다
gahn-goh-kae-sseum-nee-dah
Future
간곡할 거야
gahn-goh-kahl- -guh-yah
간곡할 거예요
gahn-goh-kahl- -guh-yae-yoh
간곡할 겁니다
gahn-goh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
간곡하세요
gahn-goh-kah-sae-yoh
Suggestion / Let's Polite (요)
간곡해요
gahn-goh-kae-yoh
Question Polite (요)
간곡해요?
gahn-goh-kae-yoh-?
Connective “and” — (고)
간곡하고
gahn-goh-kah-goh
Conditional “if” — (면)
간곡하면
gahn-goh-kah-myuhn
Noun form — (기)
간곡함
gahn-goh-kahm